心脏CT发展史

1、2nd Symposium on Multislice CT of the Chinese Society of Radiology2nd Symposium on Multislice CT of the Chinese Society of Radiology& Stanford University, School of Medicine& Stanford University, School of MedicineAugust 13-15, 2009August 13-15, 2009Dalian, ChinaDalian, ChinaSir Godfrey N. Hounsfiel

2、d1919-2004Alan M. Cormack1924-19981979 诺贝尔医学与生理学奖sourcedetectorattenuationattenuation平行束投影160 采样 180 角度 (每 1) 160 采样 180 角度 (每 1) 扫描时间: 4.5 分钟 !平行束投影sourcedetector测量射线衰减 180 (+扇角) 机架旋转12336036036036036036000.51.52.503603.53604 sec36036036036036036001.511.522.5303603.53604 secHausleitner et al. JAMA.

3、 2009;301:500-507Range of medians: 329-2147 mGy*cm4.6 - 30.1 mSvn=1965 patients, at 50 study sitesDose-length-produt (mGy*cm)Hausleitner et al. JAMA. 2009;301:500-507Range of medians: 329-2147 mGy*cm4.6 - 30.1 mSvn=1965 patients, at 50 study sitesDose-length-produt (mGy*cm)36036036036036036001.511.5

4、22.5303603.53604 secRSNA 2008 technical exhibition19岁男性, 冠脉畸形LAD起于RCA, 间隔支测量射线衰减 180 (+扇角) 机架旋转半圈重建, 需要180投影数据 (+扇角)syst syst (81% RR)(81% RR)diast diast (32% RR)(32% RR)editededited(-600ms)(-600ms)改进 烫阳极 Coolidge 球管 (1913)GE Performix Tube Straton tubeStraton tubePhoto: CourtesyPhoto: Courtesyof Si

5、emensof SiemensMotorMotorX-raysX-raysElectron beamElectron beamDeflection coilsDeflection coilsOil for coolingOil for coolingSchardt et al. Medical Physics 2004; 31:2699-2706(Coolidge, General Electric Company, US Patent 1.215.116, 1917)Flohr, Eur.Radiol 200533 cm-10010203040-500050032 row detector

6、, slicewidth: 0.6mm, pitch: 1.5 Rf=595mm, Rd=490.6mm, p=0 mm-10010203040506070-500050032 row detector , slicewidth: 0.6mm, pitch: 3 Rf=595mm, Rd=490.6mm, p=0 mm-10010203040506070-500050032 row detector , slicewidth: 0.6mm, pitch: 3 Rf=595mm, Rd=490.6mm, p=0 mmSFOVz-direction2nd Symposium on Multislice CT of the Chinese Society of Radiology2nd Symposium on Multislice CT of the Chinese Society of Radiology& Stanford University, School of Medicine&